<script setup lang="ts">
//组合式API函数watch
import { watch, ref, reactive, nextTick,onBeforeMount } from 'vue';
//引入获取已有属性与属性值接口
import { reqAttr, reqAddOrUpdateAttr, reqRemoveAttr } from '@/api/product/attr';
import type { AttrResponseData, Attr, AttrValue } from '@/api/product/attr/type';
//获取分类的仓库
import useCategoryStore from '@/store/modules/category';
import { ElMessage } from 'element-plus';
let categoryStore = useCategoryStore()

//路由组件销毁的时候，把仓库分类相关的数据清空
onBeforeMount(()=>{
    //清空仓库数据
    categoryStore.$reset();
})

//定义card组件内容切换变量:scene=0,显示table，scene=1，展示添加与修改属性结构
let scene = ref<number>(0)
//添加属性按钮的回调
const addAttr = () => {
    //每次点击的时候先清空数据再收集数据
    Object.assign(attrParams, {
        attrName: "",//新增熟悉的名字
        attrValueList: [],//新增的属性值数组
        categoryId: categoryStore.c3Id,//三级分类的ID
        categoryLevel: 3,//代表三级分类
    })
    //切换为添加与修改属性结构
    scene.value = 1;
}
//table表格修改已有属性按钮的回调
const updateAttr = (row: Attr) => {
    //切换为添加与修改属性结构
    scene.value = 1;
    //将已有的属性对象赋值给attrParams对象
    //ES6->Object.assign进行对象的合并
    //解决浅拷贝json或者loadsh
    Object.assign(attrParams, JSON.parse(JSON.stringify(row)));

}
//删除某一个已有属性的方法回调
const deleteAttr = async (attrId: number)=>{
    //发相应的删除已有的属性的请求
    const result: any = await reqRemoveAttr(attrId);
    //删除成功
    if (result.code === 200) {
        ElMessage({
            type: 'success',
            message: '删除成功'
        })
        //获取一次已有的属性与属性值
        getAttr();
    } else {
        ElMessage({
            type: 'error',
            message: '删除失败'
        })
    }
}



//取消按钮的回调
const cancel = () => {
    scene.value = 0;
}
//保存按钮的回调
const save = async () => {
    //发请求
    let result: any = await reqAddOrUpdateAttr(attrParams);
    //添加属性|修改已有属性已经成功
    if (result.code == 200) {
        //切换场景
        scene.value = 0;
        //提示信息
        ElMessage({
            type: 'success',
            message: attrParams.id ? '修改成功' : '添加成功'
        });
        //获取全部已有的属性与属性值
        getAttr();
    } else {
        ElMessage({
            type: 'error',
            message: attrParams.id ? '修改失败' : '添加失败'
        })
    }
}
//收集新增属性的回调
let attrParams = reactive<Attr>({
    attrName: "",//新增熟悉的名字
    attrValueList: [],//新增的属性值数组
    categoryId: '',//三级分类的ID
    categoryLevel: 3,//代表三级分类
})
//添加属性值按钮的回调
const addAttrValue = () => {
    //点击添加属性按钮是，向数组添加一个属性值对象
    attrParams.attrValueList.push({
        valueName: '',
        flag: true,//控制每一个属性值编辑模式与切换模式的切换
    })
    //获取最后的el-input组件聚焦
    nextTick(() => {
        inputArr.value[attrParams.attrValueList.length - 1].focus();
    })
}
//属性值单元失去焦点事件回调
const toLook = (row: AttrValue, $index: number) => {
    //非法情况1判断:不能为空
    if (row.valueName.trim() == '') {
        //删除掉调用对应属性值为空的元素
        attrParams.attrValueList.splice($index, 1)
        //提示信息
        ElMessage({
            type: 'error',
            message: '属性值不能为空'
        })
        return;
    }
    //非法情况2重复：不能重复
    let repeat = attrParams.attrValueList.find((item) => {
        //把当前失去焦点属性值对象从当前数组中扣出来判断
        if (item != row) {
            return item.valueName === row.valueName;
        };
    })
    if (repeat) {
        //将重复值干掉
        attrParams.attrValueList.splice($index, 1)
        ElMessage({
            type: 'error',
            message: '属性值不能重复'
        })
        return;
    }

    //相应的属性值对象flag变为false，展示div
    row.flag = false;
}
//属性div点击事件
const toEdit = (row: AttrValue, $index: number) => {
    //相应的属性值对象flag变为false，展示div
    row.flag = true;
    //nextTick：响应式数据发生变化，获得更新的DOM组件实例
    nextTick(() => {
        inputArr.value[$index].focus();
    })
}
//准备一个数组用于存储对应的组件实例el-input
let inputArr = ref<any>([])



//存储已有的属性与属性值
let attrArr = ref<Attr[]>([]);

//监听仓库的三级分类ID变化
watch(() => categoryStore.c3Id, () => {
    //清空上一次查询的属性和属性值
    attrArr.value = [];
    //保证三级分类得有全球
    if (!categoryStore.c3Id) return;
    //获取分类Id
    getAttr();
})
//获取已有的属性与属性值的方法
const getAttr = async () => {
    const { c1Id, c2Id, c3Id } = categoryStore;
    let result: AttrResponseData = await reqAttr(c1Id, c2Id, c3Id);
    if (result.code == 200) {
        attrArr.value = result.data;
    }
}


</script>

<template>
    <div>
        <!-- 三级分类全局组件 -->
        <Category :scene="scene" />
        <el-card style="margin:10px 0px">
            <div v-show="scene == 0">
                <el-button  v-has="`btn.Attr.add`"  type="primary" size="default" icon="Plus" :disabled="categoryStore.c3Id ? false : true"
                    @click="addAttr">添加属性</el-button>
                <el-table border style="margin:10px 0px" :data="attrArr">
                    <el-table-column label="序号" type="index" align="center" width="80px"></el-table-column>
                    <el-table-column label="属性名称" width="120px" prop="attrName"></el-table-column>
                    <el-table-column label="属性值名称">
                        <!-- 使用插槽 -->
                        <template #="{ row, $index }">
                            <el-tag style="margin:5px" v-for="(item, index) in row.attrValueList" :key="item.id">{{
                                item.valueName }}</el-tag>
                        </template>
                    </el-table-column>
                    <el-table-column label="操作" width="250px">
                        <!-- row:已有的属性对象 -->
                        <template #="{ row, $index }">
                            <!-- 修改已有属性的按钮 -->
                            <el-button v-has="`btn.Attr.update`" type="primary" size="small" icon="Edit" @click="updateAttr(row)"></el-button>
                            <el-popconfirm :title="`你确定删除${row.attrName}?`" width="200px" @confirm="deleteAttr(row.id)">
                                <template #reference>
                                    <el-button v-has="`btn.Attr.remove`" type="primary" size="small" icon="Delete"></el-button>
                                </template>
                            </el-popconfirm>
                        </template>
                    </el-table-column>
                </el-table>
            </div>
            <div v-show="scene == 1">
                <!-- 展示添加属性与修改属性的结构 -->
                <el-form :inline="true">
                    <el-form-item label="属性名称">
                        <el-input placeholder="请输入属性名称" v-model="attrParams.attrName"></el-input>
                    </el-form-item>
                </el-form>
                <el-button @click="addAttrValue" :disabled="attrParams.attrName ? false : true" type="primary"
                    size="default" icon="Plus">添加属性值</el-button>
                <el-button type="primary" size="default" @click="cancel">取消</el-button>
                <el-table border style="margin:10px 0px" :data="attrParams.attrValueList">
                    <el-table-column label="序号" width="80px" type="index" align="center"></el-table-column>
                    <el-table-column label="属性值名称">
                        <template #="{ row, $index }">
                            <!-- blur：失去焦点 -->
                            <el-input :ref="(vc: any) => inputArr[$index] = vc" v-if="row.flag"
                                @blur="toLook(row, $index)" size="small" placeholder="请你输入属性值名称"
                                v-model="row.valueName"></el-input>
                            <div v-else @click="toEdit(row, $index)">{{ row.valueName }}</div>
                        </template>
                    </el-table-column>
                    <el-table-column label="属性值操作" width="120px">
                        <template #="{ row, $index }">
                            <el-button type="primary" size="small" icon="Delete"
                                @click="attrParams.attrValueList.splice($index, 1)"></el-button>
                        </template>
                    </el-table-column>
                </el-table>
                <el-button type="primary" size="default" @click="save"
                    :disabled="attrParams.attrValueList.length > 0 ? false : true">保存</el-button>
                <el-button type="primary" size="default" @click="cancel">取消</el-button>
            </div>
        </el-card>
    </div>



</template>

<style scoped></style>